Improvement in machines for bending metal



7 ;14j SR pso q OR 210,873

W. T. NICHOLS. Machine for Bending Metal. No. 210,873. Patented Dec. I7, 1878.. ,flr ne k mlliu -Ji fig m l I I .I 111111 [I w .lllllllll'l'llll f 1- a n n: l

' nnulmu Al z 41m I: 4- A I", 146131105565 is lrlwnior,

0' C .fi 74 171201 T/Vichols a B 4- 1 5 jimmirjnmnumn.wuum-nunnitoini niirinumz. I I I 14f; 0177 0378.

wlgewise a metal strip, fastened at one end by the device shown. The, outer Hie purpose set forth, in combination with the rotary follawer I and the eccenedge of said strip is made to fit into the groom in the follower, the latter being l tric journal post G, and a deriw to hold said journal-post in ndjmatment subaflaptcd to slide up and drwn oran ewenm'c journal-post. By revolving the smntinlly as and for the purpose set forth.

im ui m man 31 m U i b t edggwige around it, 1 2. The jonrnal-shafi B of the former, in combination with :lre followerljournal G and the adjustable rigid connecting device K k, substantially as and for the purpose set forth 3. The Nvnlving follower I, composed of the thimble, collar i. 9"" nut i [all cfnltl'tjlt arranged substantially as described.

- immoral/taut IN MACl-llNE Sft-QR'BENDING Be it knowirthatl, \ViLLiluu T; Stencils, of Chicago, in the county of' Uoek and State of Illinois, have invented a new and useful linprovemcnt in Machines for Bending Metal Edgewise, which is fully describtd in the following specification, reference beinghadto t he aceom 'ulnyin g drawings, in which- Figure 1 represents a plan view of the Ina-- chine; Fig. 2, an elevation of the same; Fig.

3, a sectional view of the.eircular'bendiugdie or former, taken on the line .1 r, Fig. 1, and

' Fig. 4 a sectional view of the follower.

My invention relates to a machine for bendhug-strips or plates of metal into a circular form edgcwise, and is adapted especially to the purpose of forming the spiral blades enrployed in a rotary harrow, for which Letters Patent No. 187,709 were granted to me February 27, 1877, although it is not limited to this use, but may be employed for bending strips or sheets of metal edgewise for any purpose whatever.

My invention consists in mounting the fol-' lower upon an eccentric shaft, whereby it may be adjusted to adapt the machine to strips of difl'erent width.

ltialso consists in an adjustahle device of special construction for holding the former and follower rigidly in position with each other.

it; also consists in the peculiar structure of the revolving follower.

In .the dmwings, A represent the bed or support of the machine, upon which the operating-posts are'inounted, and which is adapted to the particular shape of the former, and is firmly secured inits place.

A shaft; or post, 1!, rises vertically fronr the :central portion 01' the bedpicce. on which is loosely mounted a large worm-gtar' wheel, 0, with which a worm, D, engages, and by which it is driven, the worm or screw being mounted in suitable hearings on the bed-piece. Upon the upper faceot' the gear-wlwel (.1 isa vertical sleeve, e,-which constitutes the journalbearing for a'cireular die or former, E, which is mounted upon the gear-wheel, and may be turned thereon forauljustmeatabout'thc sleeve 0., The former is fastened to the gear- 1 WILL M Si-e' 'ioi-is,

Specification fonning part of Letters Patent No. 210,873, dated December IZ IE TE; application filed t I -Ianuar v25,1878." I I v 'I L...

oir onieAGO, YIl LI sOisLf' "face of vthe latter, -wliicli enter-correspond ing' holes in the lower face .of the rim 0 the die. The die or former will be rotated, therefore, by the revolution of the gear-wheel, but may be disengaged therefrom at; anytime for :uljustment, and cntireivren oved for repairs or any otler purpose, whenever desired. by raising itvup from oil theshaft; 13. The

driving-wheel (J may also be removed in the lSt'llllC lllilllllClj.

prefer to cut out the central portion thereof on its lower face, so as to give it the shape shown in Fig. I of the drawings. In the rim or outer ed go of this former agroove, (1, is out, which isperpendicular to the axis ofthe former and deep enough to receive and retain the edge of the strip of metal to be bent. In the drawings this groove is represented as running around the rim of the former spirally, so as to give a spiral twist to the metal atthe same time that it is bent, edgewise.

My invention is not restricted, however, to. this special arrangement'of the groove, for it is evident that. it may be run straight. around the former orin anyother direction, according to the particular shape which itis desired the strips should assume when hent.

Upon the upper surface of the former is a pivoted clamp, F, arranged so as to clamp and hold the edge of the strip at the end thereof whcnplaced in the. groove at the-point 0f origin of the latter. This clanipis adjusted and secured by means of a bolt and nut,f.

A post, (i, is mounted in a suitable socket,

ll, in the bed-piece, and -.is fastencd'iu posi-' so that the post will stand outsideof the gear.-

wheel and former.

(in the upper portion of the post. or shaft a circular follower, l, is loosely mounted, so as to'he free tot-evolve aboutv the post, and at .the, same time rise and fall thereon. The

tubular portion of this'followeris providod wheels-l y means of pins 0 upon the upper with a screw-thread on itslowerentho'n which m my.

I o. a

'is'turned a-nut, and between this nu-tiand shoulder, 1'', on the npperpart ofthis tube, are

Y two loose. collars, 1", which are. held between 1 the nut and shoulder. '.lhel( nvercollar is befvele.d,as shown in Fig. 4 ot' the drawings, so as to leave aspace bet-ween it-and the upper one,

which takes the form of a groovearound the follower'when the parts are adjusted and Secured iu plaee as shown in 1* i;:.

It is evident-that the size of this groove may be regulated by mljusting the nut 11 so as to accommodate metal of ditl'erentthicknesses.

The construetionot' the post G with the up-' per part, eccentric to thelower or pivotal portion permits'the follower to be adjusted horizontally with relation to the grooved former,

so as to accommodate strips of ditlerent width;

Itis necessary that the grooved former and follower should be held inunvarying relation to each other, and to hold them thus rigidly in relation to each other, link-rods K are attached, respectively, to the upper-ends ot' the shaft 13 and post G, which are fitted for eyes on the ends of the rods, which slip over the -tops of the posts. The inner ends'ot' rods are threaded, and to them is fitted a double nut, 7;, by means of which this connecting device may be adjusted to-suit the adjustment of the eccentric follower-post: and as the ad-- justment may-be effected with greatnicety and the eonnection'is perfectly rigid, whatever the adju'stnmnt. there can be no springing between 'the two upright shafts, and the former and follower are consequently held in unvaryingrelation to each other.

The. operation of this machine is asfollows: The metallic strip is inserting oneedge-in the groove; therein and screwing down the clamp upon the corner in the groove. The other edge is placed in the groove of-the follower I,formed by-the two collars. and the eccentric-post adjusted so that. the follower will titup snugly against the edge of the strip, the connection K I: bcingalsoadjusted as may be required. The former is then rotated by means of the screwcaring, heretofore described, so as to earrythc strip around with it between-the groove 0 and the follower I, by which movement the strip of metalxwill drt'ippingdown on its journal as the strip fol-- shown in the drawings. A socket, .ll',is'also side of the machine, to acwtmnodate the bendversa.

strip may be bent in form'of a true circle -b running the groove straight around thevformer; or it. may be given any desired shape by changin, as described.

fastened to the former by' suitably space the distance between the sevthe purpose for which they are intended.

satisfactorily, 'iurposes.

ters Patent, is-- v l; The rotary former E, with ciremnfereutial groove (1, as and for thexpurpose set forth, in combinationwith the rotary followerI and the eccentric journal-post G, and a device to hold said journal-post in adjustment, substantially as and for-the purpose set forth.;

Thejourmtl-shat't B-of the former, in combination with the t'ollower lout'n'al G and the :uljnstalde rigid connecting device K 1:, sub; stantially as and for the purpose set forth.

Ii. The revolving lbllowerl,'composed of the thimble, collars i", and nut-i, all constructed and arranged substantially as described;

I Witnesses: i

.L. A. HUNTING,

be bentedgewise into the groove, and at the' san1etime'rcceive a spiral t-wist,-the followerlows the spiral arrangementof the groove;-

provided forthe'tbllower-poston the opposite f. ing; of right-and let'tspirals, which is accent plished by changing the follower from one side, of the machine tothe other, and changing theff former frolnu-rigltt-to a left spiral, orviee As already stated, this machine is not. restricted to the :constrnction of spirals. The" ing the shape ofthe die'and t-heigrooye there i In bending spirals,the former is,-of course, constructed with the rim of sutlicientwidth-to eral spiralsot' the groove therein, sothatthe strips, when bent, will beproperly wound for The machine. doesits work effectively and" i and is applicable for"varions 1 llaving thus described my invention, what I claim as new, and desire to secure by Let; 

